No abstract

Simulation of two-dimensional turbulent forced convection flow adjacent to inclined backward-facing step is presented to examine the effects of step length and inclination angle on flow and heat transfer distributions. The flow is considered to be steady, turbulent and incompressible. The low temperature fluid flows over a horizontal surface with an inclined backward step such that the bottom wall and step are heated with uniform temperature. The continuity, Navier-Stokes and energy equations are solved numerically and the k- model is used for turbulence flow modeling. Because of the complex flow geometry, the governing equations are transformed into the computational domain and the discretized forms of these equations are obtained with finite volume scheme. The relation between physical and computational domains is obtained by conformal mapping technique using the Schwarz-Christoffel transformation. Numerical results provided conclusive evidence that the step length and its inclined angle have considerable effects on the heat transfer and flow distributions. The fluid flow and heat transfer predictions are compared with theoretical results of others and satisfactory agreement is observed.